Influence of stirring speed on the crystallization of calcium carbonate

被引:33
作者
Yan, Feng-Wen [1 ,2 ]
Zhang, Shu-Feng [1 ,3 ]
Guo, Cun-Yue [1 ]
Zhang, Xiao-Hui [1 ,2 ]
Chen, Guo-Chang [1 ]
Yan, Fang [1 ]
Yuan, Guo-Qing [1 ]
机构
[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci BNLMS, New Mat Lab, Inst Chem, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Tianjin Normal Univ, Coll Chem & Life Sci, Tianjin 300074, Peoples R China
关键词
stirring speed; calcium carbonate; crystallization; MORPHOLOGY; MESOCRYSTALS; PRECIPITATION; PARTICLES; CRYSTALS;
D O I
10.1002/crat.200900190
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Control over crystal morphology of calcium carbonate (CaCO3) was investigated by simply changing the stirring speeds in the process of CaCO3 formation. Scanning electron microscopy (SEM) and powder X-ray diffraction (XRD) measurements explore the morphology evolution of CaCO3 at varying stirring speeds. As the stirring speeds increase, rhombohedral oalcite, spherical vaterite, and monoclinic crystal with coexistence of calcite phase and vaterite phase were formed, suggesting a facile control over calcium carbonate crystallization in constructing crystals with desired morphology. Moreover, almost pure vaterite spherical particles of narrow particle size distribution were formed at optimum. stirring speed. Finally, also elucidated in this work is the mechanism investigation into the construction of various crystal forms via this simple route. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码:725 / 728
页数:4
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